Bucksaw.



No. 685,l73. Patented 001. 22, l90l. c. T. REDFIELD.

BUCKSAW.

(Application filed Apr. 16, 1901.) (No Model.)

fills- 1 2 lllllIll!llllllllllllllllllllllll a WITNESSES JN v5 TOR v $0 6 v aarzssiiziegzezaz. 1: 49 B) I l I ATTORNEYS a citizen of the UNITED STAT S PATENT OFFICE.

CHARLES T. REDFIELD, OF GLENHAVEN, NEW YORK.

B u cKs'Aw.

S'IECIFICATION forming part of Letters Patent No. 685,173, dated October 22, 1901. Application filed April 16 1901. Serial No. 56,069. (No model.)

To all whom it may concern:

Be it known that I, CHARLES T. REDFIELD, United States, residing at Glenhaven, in the county of Cayuga and State of New York, have made certain new and useful Improvements in Bucksaws, of which the following is a specification.

My invention is an improvement in bucksaws, and particularly in that class of bucksaws illustrated in my former patent, No. 654,075, dated July 17, 1900; and the present invention relates to the means for connecting the continuous brace-bar, which overlies the arch-bar, to'the end bars of the saw-frame, and has for an object to provide means which will facilitate the connection of the brace-bar with the end bar and also permit an adjustment atsuch point, whereby to aid in tightening the frame and taking up any slack that may occur from any cause.

The invention consists in certain novel constructions and combinations of parts, as will be hereinafter described and claimed.

In the drawings, Figure 1 is a side view of a saw embodying my invention. Fig. 2 is a detail perspective view of one end of the brace-bar. Fig. 3 is a detail perspective view of the bearing-plate for the screw-head. Fig. 4 is a detail sectional view of said plate on about line 4 4 of Fig. 3. Fig. 5 is a detail perspective view of the screw. Fig. 6 is a detail sectional View on about line 6 6 of Fig. 1. Fig. 7 is a detail sectional view on aboutline 7 7 of Fig. 1. Fig. 8 is a detail view of a portion of the outer edge of one of the end bars, showing the joint of the brace-bar therewith; and Figs. 9 and 10 show somewhat different constructions within the broad principles of my invention.

The saw shown in Fig. 1 has the end bars A, the blade B, and its adjusting means substantially like the corresponding parts shown in my former patent before referred to, and I also employ in the present saw the arch-bar C, which is engaged with the end bars, as in my former patent, and the brace-bar D, which overlies the arch-bar and is connected at its ends with the end bars; but while the archbar 0 is engaged with the end bars, as in my former patent, I employ in the present construction a novel means for securing the ends of the brace-bar to the end bars. This is shown in detail and consists, broadly, in providing a screw which extends longitudinally in the direction of length of the brace-bar B and operates to secure the said brace-bar to the end bar.

In the construction shown in Figs. 1 to 8, inclusive, I form the brace-bar D with its tenons E to extend slightly beyond the outer edges of the end bars, as shown at E, and I form the outer ends of said tenons with notches E which extend from side to side of said ends, as shown in Fig. 2, and receive the bearing-plates F, which are shown in detail in Figs. 3 and 4. These plates F are provided with holes F for the passage of the screw G, and are provided on their outer faces with the square surfaces F to receive the bearing of the head G of the screw, and have their inner faces at F formed to coincide with the outer surface of the end bars A, so that the bearing-plates will fit closely against the said outer surfaces, as will be understood from Figs. 1, 6, 7, and 8. I provide in the outer ends of the tenons E screw-holes E leading from the base-walls of the slots E and extending beyond the inner ends of the tenons for a considerable distance into the body of the brace-bars, as best shown in Fig. 6 of the drawings. a It will be noticed in Fig. 1, which shows the parts applied, and also in Fig. 8, that the screw G is passed through the bearing-plate F, which latter overlaps the outer edges of the end bars on opposite sides of the mortise for the tenon E, and the screw is turned into the body of the brace-bar, as will be understood from Fig. 6. By this means I provide a simple construction for connecting the brace-bar rigidly to the end bar, which construction permits of convenient adjustment for the purpose of taking up slack which may occur from any cause. It will also be noticed that the screw may be readily applied without any such accurate fitting as is necessary when the brace-.bar is secured to the end bars by means of the cross-pins, such as shown in my former patent referred to. I find in practice that the form of connection before described facilitates the tightening up of the saw-frame, as it permits an adjustment at the ends of the brace-bar, which may cooperate with the adjustment of the blade in securing the desired tightening of the saw-frame when the frame is first put together or whenever necessary thereafter. The improved construction enables the user to take up the set or slack of the frame from time to time by turning in the screw G slightly from time to time, thus preserving the full limit of the thumb-screw on the saw-blade and also operating to bring the bearings true at the ends of the arch-bar, as it will be understood that if the saw-blade be tightened up to such an extent as to tilt the end bars slightly on the ends of the arch-bar the screw G may be adjusted in connection with the adjusting devices of the saw-blade to bring the bearings at the ends of the archbar squarely against the end bars, as desired. It will also be understood that the screw may be adjusted to maintain the tensile pull on the brace-bar and so hold the same firmly to its work at all times.

In Fig. 9 I show the brace-bar provided with an opening at H, in which is seated a nut H for engagement by the screw G, and this construction may be employed in some instances instead of screwing the screw G directly into the body of the wood and may be operated like the construction shown in Figs. 1, 2, and 6, when desired, or it may be desired in some instances to employ the construction shown in Fig. 10, in which a screw I is turned between the tenon and the wall of its mortise and bears partly in each, operating to secure the ends of the brace-bar rigidly to the end bars. In adjusting the bracebar by the construction shown in Fig. 10 the screw may be removed and moved up a tread and again turned home. It will be understood, however, that I prefer the construction shown in Figs. 1 to 8 and before described.

Having thus described my invention, what 1 I the outer side's of the end bars and the screws passed through said plates and screwed in 1 connection with the brace-bar substantially I claim, and desire to secure by Letters Patout, is-

1. The improvement in saws herein described consisting of the end bars, the bracebar extending between the same and provided at its ends with tenons having end slots and screw-holes extending from the base-walls of said slots, the end bars having mortises for the tenons of the brace-bar and the said tenons being arranged to proj outer surfaces of the end bars, the bearingplates fitting at their middle portions in the slots of the tenons, having their inner faces conformed to the outer surfaces of the end bars and their outer faces provided with square bearings for the heads of the screws, and the screws passing through said bearingplates and screwed into the ends of the bracebar substantially as and for the purpose set forth.

2. The combination substantially as described of the end bars provided with mortises, the brace-bar having the end tenons fitted to said mortises and provided with the end sockets or screw-holes, the bearing-plates bearing outside the end bar, and the screws passed through said bearing-plates and into the ends of the brace-bar substantially as set forth.

3. The herein -described improvement in bucksaws comprising the end bars, the bracebar extending between the end bars and provided at its ends with tenons fitting in mortises in said end bars, and screws extending longitudinally in the direction of length of the brace-bar and arranged to secure the latter to the end bars of the frame substantially as set forth.

4. The combination in a bucksaw of the end bars having mortises, the brace-bar having end tenons fitting in said mortises and pro vided with end slots and with sorew holes lead ing from the base-walls thereof, the bearingplates fitting in said slots and lapping against the outer sides of the end bars, and the screws substantially as set forth.

5. The combination of the end bars, the cross-brace, the bearing-plates lapped against as set forth. 7 CHARLES T. REDFIELD.

Witnesses:

SoLoN O. KEMON,

PERRY B. TURPIN.

ect beyond the 5d 

